USGS Body-Wave Moment Tensor Solution

SOUTHEASTERN ALASKA

13/01/14 14:55:52.84

Epicenter:  55.078 -134.533
MW 5.5

USGS MOMENT TENSOR SOLUTION
Depth  11         No. of sta: 39
Moment Tensor;   Scale 10**17 Nm
  Mrr= 0.19       Mtt=-1.68
  Mpp= 1.49       Mrt= 0.42
  Mrp= 0.34       Mtp= 1.36
 Principal axes:
  T  Val=  2.10  Plg=14  Azm=291
  N        0.11      75       84
  P       -2.22       7      200

Best Double Couple:Mo=2.2*10**17
 NP1:Strike=335 Dip=75 Slip= 175
 NP2:        66     85        15

Moment Tensor Solution
The figure above shows a visual representation of the style of faulting (focal mechanism) derived from the estimated moment tensor. Shaded areas show quadrants of the focal sphere in which the P-wave first-motions are away from the source, and unshaded areas show quadrants in which the P-wave first-motions are toward the source. The dots represent the axis of maximum compressional strain (in black, called the "P-axis") and the axis of maximum extensional strain (in white, called the "T-axis") resulting from the earthquake.

Moment Tensor Solution